Pantograph base arm



FIG. 1 is a right-side view of a pantograph base arm showing the new design;

FIG. 2 is a left-side view thereof;

FIG. 3 is an enlarged front view thereof;

FIG. 4 is an enlarged top view thereof;

FIG. 5 is an enlarged rear view thereof.

FIG. 6 is a right-side view showing the pantograph base arm in a contracted position;

FIG. 7 is a left-side view thereof;

FIG. 8 is an enlarged front view thereof;

FIG. 9 is an enlarged top view thereof.

FIG. 10 is a right-side view showing the pantograph base arm in an extended position;

FIG. 11 is a left-side view thereof;

FIG. 12 is an enlarged front view thereof.

FIG. 13 is a right-side, partial perspective view of the pantograph base arm in a tilted position;

FIG. 14 is a left-side, partial perspective view thereof; and,

FIG. 15 is an enlarged front, partial perspective view thereof.

The broken lines in FIGS. 1-15 are included to show portions of the pantograph base arm or environmental structure that form no part of the claimed design. 

CLAIM The ornamental design for a pantograph base arm, as shown and described. 